Question

In plants, CO2 elimination is a major exchange at night. Give reason

Answer 1

Plants give out carbon dioxide not only at night but during the day too. It happens because of the process of respiration in which plants take in oxygen and give out carbon dioxide. As soon as the sun rises another process called photosynthesis starts, in which carbon dioxide is taken in and oxygen is given out.

Answer 2

Answer:

At night when there is no photosynthesis occurring CO2 elimination is the major exchange activity going on. During the day CO2 generated during respiration is used up of photosynthesis and hence there is no co2 release.